#include<stdio.h>
#include<unistd.h>
#include<string.h>

int main()
{
    const char* s1 = "hello write\n";
    write(1,s1,strlen(s1));
    const char* s2 = "hello fwrite\n";
    fwrite(s2,strlen(s2),1,stdout);
    const char* s3 = "hello fprintf\n";
    fprintf(stdout,"%s",s3);

    fork();
    return 0;
}